@olympicvalor
Honestly it never got old, simulating the experience of having a dick without actually possessing one. Rex's telekinesis had its obvious uses and applications, of course, but manipulating energy or molecules in the air or whatever allowed him to place some propulsive movement wherever he wanted it.
So he focused it on his crotch most times he had sex, allowing him to top whoever he wanted without material intervention. Axel seemed to enjoy it, anyway.
"Fuck, you're tight—" he grunts, hips bucking against the younger guy's meaty ass cheeks, causing them to clap on each thrust. "Well I assume you're right, can't actually feel your hole around my—"
All this talking wasn't sex.
He pulls out and plops onto his back, a visible marker of his telekinesis showing Axel where to take a perch. "Ride me, baby girl—"